/Engine/Source/Developer/AnimationDataController/Public/AnimDataController.h
Removes all the curves of the provided type. Broadcasts a EAnimDataModelNotifyType::CurveRemoved for each removed curve, wrapped within BracketOpened/BracketClosed notifies.
virtual void RemoveAllCurvesOfType ( ERawCurveTrackTypes SupportedCurveType, bool bShouldTransact )